Manually operated pump duster



1953 w. D. MERRILL MANUALLY OPERATED PUMP DUSTER 3 Sheets-Sheet l m ATTORNEY Filed July 28, 1950 g F' s! I 1 a 2 2% Nov. 10, 1953 w. o. MERRILL 2,658,301

MANUALLY OPERATED PUMP DUSTER Filed July 28, 1950 s Sheets-Sheet 2 INVENTOR ATTORNEY 14 41/465 0. Mf/P/P/Z A Nov. 10, 1953 w. D. MERRILL 2,658,301

MANUALLY OPERATED PUMP DUSTER Filed July 28, 1950 3 Sheets-Sheet; 3

INVENTOR 34 14 411467 0. MF/P/F/ZZ,

its: (Adm ATTORNEY Patented Nov. 10, 1953 UNITED STATES PATENT OFFICE MANUALLY OPERATED PUMP DUSTER Wallace D;. Merrill, Monrovia, Calif., assignor to American Cyanamid Company, New York, N. Y,, a corporation of Maine Application July 28, 1950, Serial'No. 176,348

. 3 Claims. 1

The present invention relates to dusting devices.

The principal object of the present invention is to produce a device capable of ejecting either dust laden air or air minus the dust at will in a simple apparatus having a minimum number of movable parts subject to corrosion and wear which is sturdy, light, cheap to manufactureand requires minimum upkeep.

Other objects and advantages will be apparent as the description proceeds.

The invention contemplates a cylinder within which a pump piston is located which delivers air through a fixture into a nozzle which directs the air to a receptacle immediately below the fixture which may then be ejected through an opening in the fixture to serve a useful purpose. The invention contemplates a simple adjustment device whereby the stream of air under the impetus of the piston may be delivered directly to the exit port in the fixture without picking up its complement of dust in the receptacle. The device of the present invention is particularly adapted for the ejection of air carrying a dust, insecticide, fungicide or bactericidc. As many of the toxic agents used in such-dust compositions are somewhat corrosive particularly if the dispensing equipment is not thoroughly cleaned after use, it is particularly important that there should be only a few moving parts thus minimizingany K tendency toward inoperativeness in case of corrosion.

The invention further contemplates the construction, combination and arrangement of parts more fully hereinafter shown in the drawings in which:

Fig. 1 is a perspective view of a device constructed according to the present invention.

Fig. 2 is a fragmentary sectional elevation through the pump cylinder, fixture and dust container.

Fig. 3 is a bottom plan view viewed on the line 3-3 of Fig. 2 with the nozzle in position to eject air alone.

Fig. 4 is a sectional view along the line 4-4 of Fi 2.

Fig. 5 is an exploded view of the fixture and associated parts.

Referring now with particularity to the embodiment illustrated, a pump barrel is shown at having therein a piston rod 2 to the end of which a flexible pump plunger 3 is attached and carrying a handle 4 at the other end. A cover 5 fits within the confines of the top of the barrel I and is held therein by a pair of spring clips 8.

Attached to the bottom of the barrel l is a fixture indicated generally at 1 which is preferably though not necessarily a die casting because of ease of fabrication, cheapness and because die casting metal is reasonably resistant to any tendency to corrode.

As shown in Fig. 5 the fixture l is provided with an upstanding wall 8 to which the bottom of the pump barrel is attached and carries a series of spaced apart platforms 9, each of which is provided with a threaded aperture adaptedto receive screws 49 (Fig. 2) securing thereon a false bottom It having a central aperture I I therein. The central portion 12 of the fixture is provided with a boss I3 (Figsn5 and 2) adapted toreceive a flexible-cup M, the upper edges of .which'engage that portion of the false bottom immediately surrounding the aperture H.

The central portion [2 (Fig. '5) is provided with a pair of downwardly extending parallel walls 15 (Fig. 4), one of which is provided with an aperture [5a into which one end 1 6- of axially bored nozzle I1 :is fitted for rotation. The opposite end ofnozzle H is provided with a'semicylindrical socket 18 adapted to receive the simi larly shaped end l9 of the adjusting device 20 which carries an operating handle 24. It will be observed from Figs. 3', 4 and 5 that the shank of the adjusting device '20 passes through one-of the walls 15 to a point outside the fixture and that provision is made for a compressible sealing ring 22, spiral spring 23 and securing nut 24, all of which fastens the adjusting device in the fixture in a dustproof manner. It will also be observed that due to the manner in which the end 16 of nozzle [1 is fitted into one of the walls l5 of the fixture, the nozzle may be oscillated through substantially 90 from the position shown in Fig. 2 to occupy the position shown in dotted lines in Fig. 2 or in full lines in Fig. 3.

Attached to the bottom of the fixture I is a downwardly extending skirt 25 threaded as at 26 to receive the similarly threaded lip 21 of receptacle 28 which in this case may take the form of a glass jar.

The fixture l is provided with an outwardly projecting exit port 29, the inner face 30 of which is shaped to closely fit the end of nozzle l1 when it is swung upwardly in the position shown in the dotted lines of Fig. 2 and the full lines of Fig. 3 to make a substantially dust tight joint. A flexible member 3| such as a hose or the like carrying a directing nozzle 32 may be frictionally fitted over the outlet port on the fixture.

A stirrup 33 is attached as shown in Fig. 1 to the bottom of the fixture 1 and serves as a foot rest in operating the device.

It will be apparent that where it is desired to eject dust laden air, the desired dust composition is placed in the jar 28, the operator's foot placed in the stirrup 33 and the handle 4 is grasped. On the downstroke, the air passes through the aperture II in the false bottom 10, deforming. the flexible cup I4. This permits the air to pass downwardly on one side 34 of the central portion I2 of the fixture and into the open end l6 of the nozzle II. It then passes through the nozzle and impinges on the dust in the receptacle 28 and thence passes out through the outlet 29 and hose 3| carrying with it is complement of dust. The operation may be repeated as often as desired. Where it is desired either to clean out the hose of its residual dust or to give further impetus to dust already ejected through :a confined space such as a mole hole or the like, the handle 2| is manipulated so as to bring the nozzle ll into the horizontal position wherein the end thereof fits in tightly against the face 30 of the outlet '29 whereupon further strokes of the pump eject only air through the hose.

It will be seen that by such a construction a rather simple device has been provided which prevents disturbance of the dust in the receptacle on the upstroke of the plunger, which permits either the impinging of air directly on the dust before exit of the mixture of dust and air or connection of the nozzle with the outlet to bypass the dust, all with the minimum of moving parts subject to wear and corrosion. The entire device may be readily disassembled for cleaning when necessary.

It will be apparent that by moving the handle 2| into an intermediate position, that is where the nozzle I1 is directed at an angle from the horizontal, the blast of air is directed to the side of the dust receptacle 28 and delivers only a small amount of dust regardless of how hard the stroke of air is forced into the dust receptacle. This may be important where, for instance, an insecticidal dust is to be distributed which might be injurious to the operator if inhaled. As under these conditions only a small amount of dust is picked up by the blast of air, it not only prevents large clouds of dust around the operator but '4 avoids the use of excessive amounts of elected dust.

I claim:

1. In combination, a pump barrel having a reciprooatable pump plunger therein, a receptacle adapted to contain dust to be ejected, a fixture mounted between and attached to the barrel. said fixture being provided with an aperture communicating with the barrel and an air outlet through which air from the barrel may be ejected, and an axially bored nozzle adapted to be oscillated. said nozzle having one end rotatably mounted in the fixture in said aperture, the other end being movable against the inner face of the air outlet in the fixture and also movable to a position in which its longitudinal axis is parallel to the axis of the container so as to direct air from the barrel against dust in the receptacle.

2. In a combination according to claim 1, a false bottom in the barrel having an aperture therein and a flexible cup seated on the fixture and having a lip bearing against the false bottom and around the aperture to permit air to pass through the aperture in the false bottom to the fixture on the downstroke of the plunger but to prevent air passing through the aperture of the false bottom on the upstroke of the plunger.

3. In a combination according to claim 1, an adjusting device mounted in the fixture having an inner end engaging the nozzle and an outer end carrying a handle for manipulation of the nozzle.

WALLACE D. MERRILL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 297,532 Norris Apr. 22, 1884 750,521 Braymer Jan. 26, 1904 1,076,787 Rowe Oct. 28, 1913 2,086,696 Brandt July 13, 1937 2,421,183 Cakebread May 27, 1947 FOREIGN PATENTS Number Country Date 10,492/32 Australia Dec. 8, 1933 

